551636064 has 72 divisors (see below), whose sum is σ = 1792823760. Its totient is φ = 157609728.

The previous prime is 551636047. The next prime is 551636083. The reversal of 551636064 is 460636155.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134799 + ... + 138830.

It is an arithmetic number, because the mean of its divisors is an integer number (24900330).

Almost surely, 2^551636064 is an apocalyptic number.

It is an amenable number.

551636064 is an abundant number, since it is smaller than the sum of its proper divisors (1241187696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551636064 is a wasteful number, since it uses less digits than its factorization.

551636064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273652 (or 273641 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 551636064 is about 23486.9338995110. The cubic root of 551636064 is about 820.1328676231.

Subtracting from 551636064 its reverse (460636155), we obtain a palindrome (90999909).

The spelling of 551636064 in words is "five hundred fifty-one million, six hundred thirty-six thousand, sixty-four".